CHU Tong, YANG Yuesuo, LU Ying, et al. Thermal enhanced air sparging for oil contamination remediation in shallow groundwater of cold regions[J]. CIESC Journal, 2018, (8): 3701-3710.
CHU Tong, YANG Yuesuo, LU Ying, et al. Thermal enhanced air sparging for oil contamination remediation in shallow groundwater of cold regions[J]. CIESC Journal, 2018, (8): 3701-3710.DOI: 10.11949/j.issn.0438-1157.20180265.
Air sparging(AS) is often used to treat organic pollution in groundwater and soil
while the remediation efficiency would be restricted by complex field conditions such as low temperature in cold regions. Based on the results of AS pilot test in the field
taking toluene as a representative pollutant
the remediation effect of thermal enhanced air sparging for the field scale was predicted and evaluated by indoor soil column experiment and numerical modelling. The results show that there is a direct proportional relationship between the volatilization rate of toluene and temperature. In the soil column experiments
the toluene concentration decay faster under the condition of AS with high temperature gas injection. Numerical simulation of thermal enhanced air sparging for field site shows that the conduction radius of temperature is 2-4 m and the influence scope of the pollutants could expand to the area within a 10 m radius
which is about 40%-50% larger than normal AS in winter.